openai/gpt-chat-latest → A (3:2)

Side A changes subreddit import behavior to intentionally exclude stickied/pinned posts by adding a dedicated check in `parse_children`, documents the behavior, and adds a regression test covering both `stickied` and `pinned` flags. Side B fixes a real runtime issue by defining `GITHUB_API_BASE_URL` with a default, preventing a NameError in the OAuth callback, but it is a smaller configuration fix without accompanying tests or broader behavioral improvements.